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Keywords: porosity
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Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-071
... density, water absorption, apparent porosity, uniaxial compressive and tensile strength tests were performed to obtain data set for correlation analysis. With water saturation under atmospheric pressure, the uniaxial compressive strength and tensile strength of all studied lithotypes were reduced...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-024
... porosity, water absorption at atmospheric pressure, resistance to salt crystallization, rupture energy, compressive strength, flexural strength, abrasion resistance and slip resistance. The achieved results remain into the expected ones for this kind of stone. Nevertheless, small differences were found...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-031
... stress (C cd ) levels, the static elastic modulus (E s ), as well as the basic physical and dynamical properties, such as the dry density (γ d ), the effective porosity (n eff ) and the ultrasonic velocities of both primary (V P ) and secondary (VS) waves. Results obtained from the mechanical tests...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-048
..., the porosity m is calculated. The tests with fine-grained sand show that the coefficient characterizing the permeability effective stress dependence something like 0.2 MPa the permeability porosity relation can be described by an exponential function; and the Kozeny Carman equation is fulfilled at a good...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-036
... porosity, density and penetration rate. For prediction of UCS, artificial neural networks were developed between UCS and input data resulting a practical correlation. In this research, a long well segment possessing complete and continuous data coverage has been analysed, and collected data of the wellbore...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-017
... performed on Malm limestones and dolomites. The rock samples were characterized by uniaxial compressive strength (UCS), tensile strength, Young's Modulus, Poisson's ratio, bulk density, porosity and ultrasonic p- and s-wave velocities. Additionally water-permeability was measured in a triaxial cell under...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-019
... measured, including porosity, permeability, and elastic wave velocity. Mechanical characterization was then performed using a combination of uniaxial, tensile, and triaxial experiments on as-collected samples and samples thermally stressed in the laboratory. The obtained results reveal MEGT to have a high...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-067
... in air. The Region II in glass is controlled by the mass-transport to the crack tip. In the case of rock, the transport of water to crack tip is important. In general, Region II is not observed for subcritical crack growth in rock materials, because rocks contain water. Since the porosity of Carrara...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-047
... presented for completeness. The response of a Representative Elementary Volume (REV) to external mechanical loading is modeled using finite element numerical simulation in order to conclude the effective mechanical properties and compare them with the results of analytical calculations. The porosity...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-053
... important role in a precise forecast of rock behaviour under such inconsistent conditions. The mechanical properties of rocks change with density, porosity, variation of mineral assemblage, grain size, texture and effective pressures acting on them. Changes in physico-mechanical properties in metamorphic...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-054
... was determined. Hg porosity and total porosity of untempered and tempered specimens were found, too. As model material was chosen so-called Silesian granite from Nový lom quarry (Žulová pluton, Czech Republic), which has been previously tested, and over macroscopically homogeneous character the variances...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-049
... material and rock mass. Changes in strength (I.e. uniaxial compressive strength, point load strength etc Measurement of discontinuity spacing. Changes in porosity of rock material. Determination of rock quality designation (RQD Variation of chemical and petrographic features. It is concluded from...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-044
... al. 2008). Natural stones are one of those materials with high prefer ability due to their decorative view. A review of earlier investigations reveals that rock type, porosity, P-wave velocity and moisture content have the most effective factors on the thermal conductivity of rocks (Incropera...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-069
... is first described for stress induced porosity changes which affect the conditions of rock permeability. Thereafter, the basic capabilities of the modeling approach are demonstrated through the transient pulse tests during triaxial compression loading. In most respects, the simulation results meet...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-011
... Resources, Daejeon, Korea M. Takahashi National Institute of Advanced Industrial Science and Technology, Tsukba, Japan ABSTRACT: The permeability for two types of sandstone, Berea sandstone and sandstone from Otway Paaratte formation, under different confining pressure are measured and porosity...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-141
... electron microscope (SEM) observa- tions of the chalk samples are discussed in detail. The trends in a number of physico-mechanical param- eters (porosity accessible to water, water content, density and uniaxial compressive strength) are then highlighted. 885 2 DESCRIPTION OF THE UNDERGROUND QUARRIES Chalk...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-167
.... reservoir geomechanics backfilled stope compaction coefficient Upstream Oil & Gas earth pressure porosity Reservoir Characterization stope backfill material horizontal stress metals & mining Engineering cohesion water pressure backfill slump analytical solution permeability fill...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-213
...-variable function by a single variable one, P eff (P c , P p ), according to the effective pressure law: (equation)(1) Fluid Dynamics scco 2 specimen Upstream Oil & Gas pressure condition sandstone MPa flow in porous media pore pressure porosity effective pressure law interaction...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-050
... ABSTRACT: Basaltic rocks display a wide range of porosity depending on size of vesicles as a result of their complex genesis. Predicting of strength of rock material have crucial importance for design of engineering structures such as dams, foundations, tunnels, and other engineering projects...

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